https://forums.autodesk.com/t5/hsm-forum/fusion360-cam-problems-with-stl-and-3dm-files/m-p/6075612#M18670 Ric,<BR />My error that the triangles don't look even. I used a too small brush to select and probably did not select all the triangles.<BR />Attached is a video on how I reduced 49k triangles to less than 8k triangles. And still I could have taken a larger brush to make my selection go faster <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span><BR /><BR />Bob Mon, 11 May 2015 16:21:31 GMT bobvdd 2015-05-11T16:21:31Z